Reed for looms



(No Model.)

F. OTT.

REED POR LOOMS.

Paten-ted Jan. 6, 1891.

R O T N E V N T..

threads pass with very much reduced friction proved Reed for Looms, of which the follow- PATENT OFFICE-j FREDERICK OTT, OF GLOUCESTER, NEIV JERSEY.

REED FOR LOONIS.

SPECIFICATION forming part of Letters Application led February 11. 1890.

To all whom. it may concern:

Be it known that I, FREDERICK OTT, of Gloucester, county of Camden, State of New Jersey, have invented a certain new and Iming is a specification, reference being had to the accompanying drawings.

My invention has reference to reeds for looms of any kind; and it consists in placing the dents in two or more rows which cross each other.

In the accompanying drawings, Figure l represents a section of a reed having the dents arranged according to my invention. Fig. 2 is a plan view of a portion of the same. Fig. 3 shows in section a modified Way of arranging the dents. Fig. 4is alongitudinal section through either of the above at the pointw w.

As reeds are usually made, the dents are set exactly in line, and two warp-threads are passed through each space. Much of the care and supervision which are required in the management of looms is, in consequence of the constant breaking of the warp-threads, due chieiiy to the unavoidable friction of the dents of the reeds as they pass between the warp-threads. Especially is this true where there are enlargements or knots in the threads. From the time when the knot irst comes within the play of the reed until it is finally woven into the fabric the reed makes many hundredA beats, and the cumulative wear of the thread passing so many times between the dents is almost sure to cause it to break.

The obj ect of my invention is to reduce as far as possible this friction without altering the fineness or impairin g the efficacy of the reed.

Instead of placing the dents exactly in line, I arrange them in two rows, every alternate one being back and the others forward. The space between the rows need not exceed the ordinary width of a dent and may be much less. These two rows cross each other preferably along a line aboutmidway between the extremities of the dents, as shown in Fig. 1; but they may cross at one extremity, as shown in Fig. 3. Between reeds so arranged the Patent No. 444,133, dated January 6, 1891.

Serial No. 339.985. (No model.)

the same fineness-thatis,a reed having just as many threads passing through it to an inch of length. Nor is the efficiency ofthe reed diminished in any way by my arrangement. The reed performs two functions in a loom. 55 First, it keeps the threads precisely in line between the point where they are separated by the heddles and the point where the)7 are woven into the fabric, and, second, it pounds or drives the filling home. It is evident that the first of these two functions is in nowise altered by my arrangement, and when the reed is so hung that it strikes the fabric approximately along the line of the crossing of the rows of dents the second function is performed just as though the dents were in line during their entire length, for everydent will strike the filling, While as the shed causes the threads to rise or fall as they leave the fabric they are in such a position that the greater part of the play of the reed occurs where they are so situated that they pass between the dents either above or below their crossingpoint-that is, where they are alternately forward or backward and can pass with little or no friction.

In Fig. 1 of the drawings the alternate rows of dents are shown as crossing each other along a line approximately midway between the bars of the reed. Owing to the fact that the lathe swings back and forth upon a pivot, the upper-and lower bars of the reed do not have an equal amount of play; but that bar which is farther from the pivot has much the greater play and the warp-threads toward that bar are subject to more friet-ion than the others. Hence, practically, it is better that the dents should be farther apart along the farther bar than along the other, and consequent-ly they should be made to cross each other near the nearer bar. The extremelimit of this arrangement is shown in Fig. 3, where the dents cross each other directly where they join the nearer bar. By the use of this latter form of my device the friction along the warpthreads toward the nearer bar (those, however, Which are subject to the least amount of play) is not diminished from what itwould be in an ordinary reed. The increased disas compared to an ordinary reed of exactly tance between the dents towardthe other end, roo

Consequence of the red ueed friction, I :un able to use for weaving very much iiner warpthreads than @un be used with ordinary reeds without breaking".

V Having' thus desoribed my invention, l elnim 1. A reed having the dents placed in two rows which cross euch other, every alternate dent being` forward below and hack above an d the others back below and forward above, substantially set forth.

2. A reed having the dents arrangedin two rows which Cross each other along@ line puraliel to the ond bars of the reed.

'FREDERCK OTT. \\f"tnesses:

JAMES H. BELL, E. REESE. 

